Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Accrued Liabilities, Current [Abstract]
Accrued payroll		$ 230,682	$ 158,006
Taxes payable		38,326	35,122
Other employee related liabilities		74,853	60,889
Other		117,542	76,229
Total accrued expenses and other current liabilities	[1]	$ 461,403	$ 330,246

[1] We adopted Topic 842 using the modified retrospective method as of January 1, 2019 and elected the transition option that allows us not to restate the comparative periods in our consolidated financial statements in the year of adoption. Refer to Note 2 for further details.